Apparatus for drawing glass



June 19, 1928. I 1,674,529

A. E. SPINASSE APPARATUS FOR DRAWING GLASS Original Filed Oct. 16, 1915Patented June 19, 19 28 outrun. sraras;

ARTHUR E. SPINASSE, 0F MOUNT VERNON, OHIO.

- arrsanrus r03 nzaa'wme crass.

fliiginal application filed October 16, 1915, Serial No. 56,184. Dividedand this application filed February 11, 1920.

The invention relates to new and useful improvements in glass tankfurnaces, and more particularly to a glass tank furnace wherein thearticle is'drawn from a segregated section of glass disposedat one sideof the main body ofm'olten glass;

An object'of the invention is to provide means for protecting either thesegregated mass of glass from which the article is drawn,

or the article being drawn, or both, from the unequal temperatureinfluence of the mass of molten glass and the furnace heat thereon. Inthe drawings Figure, 1 is a view in section showing more or lessdiagrammatically a portion of a glass tank furnace having myimprovements applied thereto;.

Fig. 2 .is' a detail showing the modified shaping of the shield and thesegregating rm r v ig. 3 is a similar view but showing a furthermodified form of shield and segregating member; I v

Fig. 4 is a similar view but showing a still further modified form ofshield and segregating member; V f

Fig. 5 is a similar view but showing a further modification of the ringand shield.

The inventionbroadly relates to a glass tank furnace having drawingchambers at one side thereof wherein a mass of glass is segregated sothat an article may be drawn therefrom. This segregated mass of glass isat oneside of the main mass of glass in the furnace. I

From one aspect, the invention is directed to a shield which is whollyor in part above the surface of molten glass, and which surrounds theglass article being drawn, and this shield is so shaped as to equalizethe temperature edects of the heat of the furnace on the glass articlebeing drawn. Preferably the shield is a hollowv metal shield and watercooled. Preferably also the shield is formed so that its lower edge ishorizontal, and its upper edge inclined. This shield also tends toequalize the temperature eifects of the heat of the furnace onthesegregated molten glass from which the article is to be drawn.Preferably associated with the shield is a segregating memberwhichlikewise is so constructed as to regulate the temperature ef-- feet ofthe body of the molten glass on the segregated mass from which thearticle is drawn. In the preferred form of the inven- 8eria1Ho.357,983.-

tion, this segregating member is ring-shaped and its inner surface issymmetrically disposed relative to a central line and also said ring isof greater cross sectional area on the side thereof adjacent the mainmass of the molten glass in the'tank. I f

The invention will possibly be better understood by a more detailreference to the drawings. In these drawin s I have shown more or lessdiagrammatica ly a glass tank furnace 1 having a main section 2 in whichthe body of the glass is reduced to molten condition. At one side of themain section of the furnace is a drawing chamber .3 in which the portionof molten glass is segregated, and from which segregated section thearticle is drawn. I

In other words, the drawing area is at one side of the mass of themolten glass. The furnace is provided with a hearth 4 having an opening5 through which the article is drawn. For a more detail disclosure ofthe furnace and the manner of drawing the article, reference may be madeto my copending application, Serial Number 56,184, filed October 16,1915, patented April 6, 1920,

this application is a d vision. a

No. 1,336,056, of which It will be apparent that where the segregatedmass of glass from which the article is to be drawn is at one side ofthe main tank proper, and the main body of molten the temperatureefi'ects of the heat 0 furnace and the main body of glass in the l tank,tends to unequally influence the tempcrature of the glass in thesegregated mass,

and also the artlcle'being drawnfi From one aspect, the invention isdirected to a ring shield which surrounds the article.

which is being drawn at the base thereof, which shield may be eitherabove and adjacent the surface of the glass or slightly immersed in theglass. In Figure 1 of the drawings I have shown a shield 6,- which is ahollow metal shield. A chamber 7 extends throughout the entire shieldand water pipes 8, 8 connected with the shield serve the doublefunctionof supplying cooling water to the chamber-7 and as a means forraising and lowering the shieldthrough the opening in the hearth and forsupporting the same. As to the means for raising and lowering theshield, reference may be had to my 00- pe ding application, referred toabove. This hol ow metal ring shield is of greater cross sectional areaon the side thereof adjacent the main part of the furnace. The chamber 7is also shaped to conform in cross sectional area to the cross sectionalarea of the shield.

That is, said chamber is larger in cross seethe side thereof adjacentthe tional area on main part of the furnace.

While I prefer to use a hollow metal shield, it will aspects of theinvention that a refractory be understood from certain ring shield maybe used in place thereof.

E The essential feature consists inthe enlarged for the reason thataside from the-increased" area of the. shield, there is an increasedamount of cooling fluid, and consequently a dtionon that side of thearticle bein drawn. Thisring shield may be placed a ove the surface ofthe molten glass as shown in Figzontal.planes,but the side 6 ure 1, ormay be positioned so as to engage the surface of the glass as shown inFigures 2, 3, 4 and 5.. When said ring shield engages the surface of theglass it in part performs the purpose of a segregating ring and may bethe sole means used for this purpose, as has been described in myco-pending application above referred to.

In Figure 1 of the drawings, the ring shield is shown with its loweredge disposed in substantially a horizontal planeand above the'surfaceof the glass, while the upper edge thereof is in a plane inclined to thevertical. In Fi re- 2 ofthe drawings, I have shown the shleld with itsupper edge substantially horizontal and its lower edge in a plane in-.clined to the vertical. In Figure 3 of the drawings I have shown ashield wherein both the upper and lower edges are in horiof the shield 6is extended horizontally outwardly, thus increasing the cross sectionalarea thereof for p the urpose above described.

dill

hile, as above noted, my improved shield may be used both as a shieldingelement and as a segregating element, I prefer to use it as a shield asshown in Figure 1, and use in, connection therewith a segregating member9, and 1 also prefer to use a segregating member which is in the'form ofa ring. This segregat ng member has its inner surface symmetricallydisposed relative to a vertical line; passing through the center of thering and the wall of the segregatin ring on the side adjacent the massofmo ten glass or the mam part of the furnace, is enlarged andpreferably by extending said well downreater cooling effect throughgreater radif use a'plate 13 such as .wardly. This enlarge ent of theside wall of the segregating rin serves to equalize the influencintemperature effects of the mass of the mo ten glass in the main part ofthe furnace on the segregating mass of molten glass from which thearticle is drawn. ThlS segregating ring member maybe entirely submergedor onlypartly immersed in the body of molten glass. Said ring as shown11; Fig.1 is provided near its upper edge with a laterally projectingflange which serves as a means to cause the ring to assume an uprightposition in the moltenglass when floating. I y

7 Instead of a ring shield as shown in Figure 1, I. may, fromcertain-aspects of the invention, use the ordinary segregating ringshown at 10 in Figure 2 of the drawin s. Both the ring 9 and the ring 19may be he d in a predetermined position in the molten glass by means ofrefractory rods ,11, 11,

ing applicationreferred to above.

' Instead of the refractory ring of the form shown in Figure 2, I mavuse a refractory plate 12 such'as shown in Figure 3, or I may shown inFigure 4. Then again, I mayvuse a plate 14 such as shown in Figure 5.All of these plates are adapted to be held in a predetermined positionor at a desired depth in the molten glass. Itwill be noted that theplate .13 is disposed .at the side of the ring shield adajacent the mainmassof the glass and also that the plate- 14 is of increased thicknesson the side there of adjacent the main mass of molten glass. By thisarrangement, I am able to equalize to a certain extent the temperatureefil'ects of 3 the mass of the molten glass on the segrew gated mass ofthe molten glass from which the article is to, be drawn. The submergedplate 13 below may form an anchorage-forthe glass flowing thereabove,and in the drawing of sheet or plate glass, the shield or thesegregating means may be oblong or rectangular in shape, or may beotherwise modified in shape for drawing articles of other desired formsand the submerged 'refractory member may be shaped as desired in crosssection to regulate the temperature conditions of the glass at thedrawing area.

From the above it will be apparent that i the invention from itsbroadest aspects "is directed to a ring member used in connect1on withthe drawing of a glass article, which ring member is shaped in crosssection so as to provide a greater cross sec tional area on the sidethereof adjacent the mam part of the furnace or the main mass of themolten glass, and for the purpose of equalizing the temperature effectsof the fur-, nace heat on the one hand, when said memher is used as ashield, and of the main mass of molten glass on the other hand, whenthis member is used as a segregating member for segregati the mass ofmolten glass from which t e article is to be drawn. From other as ctsthe invention is directed to a ring shield which is Water cooled andwith which means is provided in the body of the molten glass forsegregating the mass of glass and for regulating the temperatureinfluences ofthe mass of the molten glass on said segregated mass fromwhich the article is to be drawn. From another aspect, the invention isdirected broadly to a water cooled ring shield, whether the same iswholly above the mass ofthe glass or slightly immersed therein, whichwater cooled shield has a water chamber in the side thereof adjacent themain tank, which is greater in cross section than the chamber at theop-- osite side thereof. In the drawin I have illustrated several waysof drawing glass articles by means of my invention, and While in thesefigures I have shown the drawing of a glass cylinder, it will beunderstood that within the, broad scope of the invention, a

lass sheet or other glass article may be drawn by similar means modifiedin form to correspond to the object being drawn, as fully stated in myparent a plication above referred to and of which tiis case is adivision.

It is obvious that many changes ma be made in the details ofconstruction an the shaping of the parts without de arting from theinvention as set forth in he appended claims.

. Having thus described the invention, what I claim as new and desire tosecure byLettors-Patent, is 7 all) till

1. Ina glass tank furnace havinga drawing area at one side of the massof molten glass, a. shielding member disposed above and relative to theglass so that the surface of the glass is substantially unbroken, saidshielding member being shaped in cross section so as to equalizethetemperature efiect of the body of the molten glass on the drawingarea.

2. In a glass tanlr furnace having a drawing' area at one side of themass of molten glass, a. shielding member disposed above and relative tothe glass so that the surface of the glass is substantially unbroken,said shieldingmember being shaped in vertical cross section so as toequalize the temperature etiect ot the body of the molten glass on thedrawing area, and means associated with said shielding member andentirely submerged in the body of molten glass and operating to regulatethetemperature ezdect of the mass through the molten glass on thedrawing area; I A

3. In a glass tank furnace having'a drawing area at one side of the massof molten glass, a shielding member having its inner surfacesubstantially symmetricallydisposed about the article being drawn,saidshielding member being shaped in vertical cross section so as toequalize the temperature eifect on the drawing area, for water coolingsaid shielding member.

4. In a glass tank furnace having a drawing area at one side of the massof molten glass, a shielding member, said shielding member bein lar erin vertical cross section on the side t ereof, adjacent the tank, and-means for water cooling said member.

5. In a glass tank furnace having a drawing area at one side of the massof molten class, a shield having a water cooled chamher, said shieldbeing disposed above the surface of the molten glass, said chamber alsobeing shaped in vertical cross section and means} so as to equalize thetemperature ed-ect uil' 6. In a glass tank-furnacehaving a drawmg areaat one side of the mass of molten glass, a-ring shield having a watercooled chamber, said chamber being renter in vertical cross sectionalarea on t e side thereof adjacent the mass of molten glass so as toequalize the temperature ellect on the drawin area.

A glass tank furnace having a drawing area at one side of the mass ofmolten glass, a ring shield having its inner face substantiallysymmetrically disposed about the article being drawn, one edge of saidring shield lying in a horizontal plane and the other edge of said ringshield lying in a plane inclined to the vertical whereby said ring isprovided with a greater cross sectional area on the side thereofadjacent the body of molten glass for equalizing the temperatureefi'ecton the drawing area, said ring shield being supported above thesurface oi the molten glass so that the surface of the glass issubstantially unbrokem' segregating means- 8. A glass tanl; furnacehaving a draw,

ing area at one side of the mass of molten glass, a ring shield, oneedge of said ring shield lying in a horizontal plane and the other edgeof said ring shield lying in a plane inclined to the vertical wherebysaid ring shield is provided with a greater cross sectional area on theside adjacent the mass of molten glass for equalizing the temperatureedect on the drawing area, said ring shield having a water cooledchamber.

9. A glass tank furnace having a drawing area at one side of the mass ofmolten lass, a ring shield, one edge of said ring s ield lying in ahorizontal plane and the other edge of said ring shield lying in a planeinclined to the vertical vvhereby'said ring shield is provided withgreater vertical cross sectional area on the side adjacent the main massof molten glass for equalizing the temperature edecton the drawing area,said ring shield having a water cooled chamber,

' tional area of the ring shield. A

- shield adjacent the body of bolten glass,

- drawing area,

i of adjacent 10. In a glass tank furnace having a drawing area at oneside of the mass of molten glass, a ring ring shield, said chamber beingof greater cross sectional area on the side of the ring water pipes forcirculating water throughsaid chamber, said water pipes being connectedto said ring shield and serving as a means for raising and lowering thesame.

11. In a. glass tank furnace having a a shielding means surrounding thedrawing area in a region directly above the surface of the glass, andmeans associated with said ring shield and entirely submerged in thebody of molten glass so as to equalize the temperature effect of thebody of molten glass in the tank on the mass of glass from which thearticle is to be drawn.

12. In a glass tank furnace having a drawing area at one side of themass of molten glass, a water cooled ring shield surrounding the drawingarea in the region directly'abov'e the glass, and a refractory ringsubmerged in thebody of molten glass, said refractory ring being greaterin vertical cross sectional area on the side therethe body of moltenglass.

13. In a glass tank furnace having a drawing area at one side of themass of molten glass, a water cooled ring shield surrounding the drawingarea in the region directly above the glass, and a refractory ringsubmerged in the body of molten glass, said refractory ring beinggreater in verti cal cross sectional area on the side thereof adjacentthe body of molten glass, the upper edge of said refractory ring lyingin a horizontal plane and the lower edge of said refractory ring lyingin a plane inclined to the vertical.

14. In a glass tank furnace having a drawing area at one side of themass of molten glass, a refractory ring, the upper edge of said ringbeing horizontal and the lower edge of said ring being inclined to thevertical whereby the side of the ring adjacent the body of molten glassis extended downwardly, said ring being so disposed in the mass ofmolten glass that the surface of the glass is substantially unbrokenthereby.

15. In a glass tank furnace having a drawing area at one side of mass ofmolten glass, a ring of refractory material, said refractory ring beingentirely submerged in the molten glass, the upper edge of said ringlying in a horizontal plane and having an outwardly extending flange,the lower edge of said ring being in a plane inclined to the verticalwhereby the side of the ring adjashield having a. water cooled chamberextending throughout the of, said hollow metal-ring nausea cent the bodyof molten glass is extended downwardly so as to equalize the temperatureeffect on the drawing area.

16. A glass tank furnace having a drawing area at one side of the massof molten glass -a hollow metal ring shield adapted to surround theglass article at larger cross sectional area on the side there ofadjacent the main mass of molten glass in the furnace.

-17 In a glass tank furnace having a drawing area at one side of themass of molten glass, a hollow metal ring shield, means for circulatingwater therethrough, said hollow metal ring shield being larger invertical cross section on the side thereof adjacent the mass of moltenglass.

' 18. In a glass tank furnace having a drawing area at one side of themass of molten glass, a hollow metal ring shield,.said ring shield beinglarger in vertical cross section on the side thereof adjacent the massof molten lass, the chamber within said shield being likewise larger incross sectional area on the side thereof adjacent the mass of moltenglass, and means for circulating cooling water through said shield.

19. In a glass tank furnace having a drawsubmerged beneath the surfaceof the glass glass is unbroken 1 whereby the surface of the by saidsegregating means, said segregating means progressively increasing incross section towardvthe hotter portion of the molten glass in the bathso as to control the temperature effect of the mass of molten glass onthe glass at the drawing area.

21. In apparatus for drawing glass cylinders, sheets or like articlesfrom molten glass, a receptacle for containing a bath of molten glassfromwhich to draw the article, a refractory means disposed in submergedposition with its upper portion lying the surface of the bath adjacentthe base of the drawn article so as to provide a layer of cooler glassthereabo ve from which to draw the article, said refractory means beingthe base thereshield being of Ill) below shaped in cross section so asto create varying cooling efi'ects at difierent places upon the glass ofthe of the drawn article.

, 22. In apparatus for drawing glass cylinbath adjacent the source ders,sheets or like articles from molten glass, a receptacle for containing abath of molten glass from which to draw the article, a refractory meansdisposed in submerged position with its upper portion lying below thesurface of the bath adjacent the base of the drawn article so as toprovide a layer of cooler glass thereabove from which to draw thearticle, said refractory means having its lower portion extending togreater depths in the hotter portionsof the bath to compensate forvarying drawing temperature conditions in the layer of cooler glassadjacent the source of the drawn article.

23. In apparatus for drawing glass cylinders, sheets or like articlesfrom a bath of molten glass in a furnace, a refractory body disposedwithin the bath with its upper surface in spaced relation below thesurface of the bath adjacent the drawing area to partially cool a layerof glass from which to draw the article, and shielding means for thedrawn article associated with said refractory body and-disposed with itslower portion lying spaced above the surface of the bath to leavesubstantially free the sur- 1 face of the bath between said refractorybody and shielding means, said refractory body and shielding means beingshaped in cross section to compensate for varying drawing conditions inthe bath and forming walls of the drawn article.

24:. In apparatus for drawing glass cylinders, sheets or like articlesfrom a bath of molten glass in a furnace, a refractory body disposedwithin the bath with its upper surface in spaced relation below thesurface of the bath adjacent the drawing area to partially cool a layerof glass from which to draw the article, and shielding means for thedrawn article associated with said refractory body and disposed with itslower portion lying spaced above the surface of the bath to leavesubstantially free the sur face of the bath between said refractory bodyand shielding means,,said refractory body havin portions extending inthe glass bath at difl erent distances at different places, the portionsof' said refractory bod extending to greater distances in the bath beingin the hotter portions of the bath to regulatedrawing temperatureconditions in the glass of the bath adjacent the source of the drawnarticle.

25. In apparatus. for drawin glass articles, a furnace for holding a hatof molten glass, a segregating member in the bath adjacent the source ofgeneration of the drawn article, said segregating member being entirelysubmerged and having portions projecting at different levels atdifferent places in the bath, and a shield for the drawn article indendent from said segregating -member, sai shield having its lower edge inspaced relation above the glass bath.

at predetermined desired 26. In ders, sheets or like articles from a hatof molten glass, a refractory bod with its upper port-ion submerge inspaced relation beneath the surface ofthe bath adjacent the ba e, of thedrawn article, said refractory body being irregular in shape to producea layer of cooler lass thereabove d rawing temperature. r

27. In apparatus for drawing glass cylinders, sheets or like articlesfrom a bath of molten glass, a refractory body disposed with itsupperportion submerged in spaced relation beneath the surface of thebath adjacent the source of the drawn article the lower portion of saidrefractory body ex tending to different depths at different places tocompensate for varying drawing condi tions at the drawing area.

28. In a: paratus for drawing cylinders, sheets or like articles from abath of molten glass, a shielding member disposed above and relative tothe glass so that the surface of the glass therebeneath is substantiallyunbroken, and means associated with said shielding member submerged inthebath with its upper portion in spaced relation be neath the base ofthe drawn article, said means being shaped in cross section so as tocontrol thetemperature effect of the mass of molten glass at the drawingarea.

29. In apparatus for drawing glass cylinders, sheets or like articlesfrom a bath of molten glass, a refractory body for segrelayer of coolerglass in the bath rom whic to draw the article, said refractory bodybeing located with its upper portion submerged in'the bath in spacedrelation beneath the base of the drawn argating a top ticle, saidrefractory bodv being greater in vertical cross section in the hotterportions of the glassbath.

30. In the art of drawing glass cylinders,

base of the drawn article so that the surface apparatus for drawingglass 0 lindisposed,

of the bath at the drawing area and in proximit-y thereto issubstantially free and unobstructed during drawing, and cooling thesegregated portion of the glass more strongly at one lace than anotherindesired degrees at pre etermined places and with said refractory bodyduring drawing.

31. In the art of drawing glass cylinders, sheets or like articles froma bath of molten glass, the method of segregating a portion of coolerglass in the bath from which to draw the article, by causing glass fromthe bath to pass from different levels at different places to thedrawing area to compensate for cles, a holder for a varying temperatureconditions at the draw- 'ing area while maintaining the segregating 7means submerged within the bath and the surface of the bath thereabovesubstantially free and unobstructed during drawing.

32. In apparatus bath of molten glass, a

segregating device, means for holding said device submerged within thebath in spaced being shaped so as to compensate for variation intemperature in said layer of glass, shielding means for said layer ofglass, and means for supporting said shielding means with the lowerportion thereof spaced just above the surface level of the bath so thatthe surface of the bath beneath said shielding means will besubstantially free and unbroken during drawing.

34. In apparatus for drawing glass cylinders, sheets and like articlesfrom a bath of molten glass, a segregating device having a configurationcorrespondin substantially to that of the for drawing glass artiv theopposite side'faces of baseof the article to be drawn,

and having a continuous and enclosing body for the glass beneath thebase of the article being drawn, and means for holding said devicesubmerged within the bath to provide a segregated surface layer of themolten glass from which the article maize/be drawn, said segregatingdevice lying neath and coextensivewith the base of the article bein'drawn and further having a contour form to regulate the drawingtemperature in said layer of glass.

35. The process of drawing glass 6 linders, sheets and other articlesfrom a ath of molten glass, which consists in drawing the article fromthe surface the article at its source remote from any cooling refractorywalls intersecting the surface of the bath,

and maintainih a refractory temperature controlling an anchoring elementsubmerged within the bath adjacent the base of the article being drawn.

36. The process of drawing glass cylinders, sheets and other articlesfrom a bath of molten glass, which consists, in wholly submerging aglass segregating and temperature control element within the bathslightly below the surface of the bath, while maintaining the surface ofthe bath extending over and above the entire area of sai whollysubmerged element substantially free and unbroken during drawing.

In testimony whereof, I allix my signature.

ARTHUR E. SPINASSE.

of the bath with

